Mark Brown [off-list ref] 於 2020年8月20日 週四 下午7:45寫道：

On Thu, Aug 20, 2020 at 03:53:41PM +0800, Gene Chen wrote:

quoted

+     mrd->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+     if (!mrd->regmap) {
+             dev_err(&pdev->dev, "Failed to get parent regmap\n");
+             return -ENODEV;
+     }

quoted

+static const struct of_device_id __maybe_unused mt6360_regulator_of_id[] = {
+     { .compatible = "mediatek,mt6360-regulator", },
+     {},
+};
+MODULE_DEVICE_TABLE(of, mt6360_regulator_of_id);

This device only exists in the context of a single parent device, there
should be no need for a compatible string here - this is just a detail
of how Linux does things.  The MFD should just instntiate the platform
device.

Trying to autoload module without of_id_table will cause run-time error:
ueventd: LoadWithAliases was unable to load
of:NregulatorT(null)Cmediatek,mt6360-regulator

https://lore.kernel.org/patchwork/patch/726691/
According to this patch, autoload can't load module which doesn't
include add id_table or of_id_table in module.alias
So I need keep of_if_table for auto load success